<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="cart in cartInfoList" :key="cart.id">
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cart.isChecked"
              @change="changeGoodChecked(cart)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl" />
            <div class="item-msg">
              {{ cart.skuName }}
            </div>
          </li>
          <li class="cart-list-con3">
            <div class="item-txt">语音升级款</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cart.skuPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              @click="updataGoodNum(-1, cart)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              minnum="1"
              class="itxt"
              :value="cart.skuNum"
              @change="everyGoodNum($event, cart)"
              @focus="setOldNum"
            />
            <a
              href="javascript:void(0)"
              class="plus"
              @click="updataGoodNum(1, cart)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cart.skuNum * cart.skuPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a href="#none" class="sindelet" @click="deleteGood(cart.skuId)"
              >删除</a
            >
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="AllChecked" />
        <span>全选</span>
      </div>
      <div class="option">
        <a href="javascript:;" @click="deleteAllGoods">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">
          已选择 <span>{{ checkedGoodsNum }}</span
          >件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ checkedGoodsPrice }}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { reqGetShopCart } from "@/api";
import { reqChangeChecked } from "@/api";
import { reqDeleteGood } from "@/api";
import { reqChangeAllChecked } from "@/api";
import { reqAddShopCart } from "@/api";
import { reqDeleteAllChecked } from "@/api";
export default {
  name: "ShopCart",
  mounted() {
    this.getShopCart();
  },
  methods: {
    // 请求购物车数据
    async getShopCart() {
      try {
        const re = await reqGetShopCart();
        // console.log(re);
        this.cartInfoList = re[0]
          ? re[0].cartInfoList.map((item) => {
              item.isReq = false;
              return item;
            })
          : [];
      } catch (e) {
        alert(e.message);
      }
    },
    // 改变商品的选中状态
    async changeGoodChecked(cart) {
      let skuId = cart.skuId;
      let isChecked = cart.isChecked;
      console.log(skuId, isChecked);
      try {
        await reqChangeChecked(skuId, isChecked === 1 ? 0 : 1);
        alert("修改成功");
        // 重新获取数据
        this.getShopCart();
      } catch (e) {
        alert(e.message);
      }
    },
    // 删除单个商品
    async deleteGood(skuId) {
      try {
        await reqDeleteGood(skuId);
        alert("删除成功");
        // 重新获取数据
        this.getShopCart();
      } catch (e) {
        alert(e.message);
      }
    },
    // 更改商品的数量
    async updataGoodNum(num, cart) {
      // 判断是否请求完毕
      if (cart.isReq) return;

      // 进入请求 设置为正在请求
      cart.isReq = true;
      // 获取改变数量的id
      let updataSkuId = cart.skuId;

      // 获取当前商品数量
      let goodNum = cart.skuNum;
      // 判断改变的数量是否小于0
      if (goodNum + num <= 0) return (cart.isReq = false);
      try {
        await reqAddShopCart(updataSkuId, num);
        // 重新获取数据
        this.getShopCart();
      } catch (e) {
        alert(e.message);
      }
    },
    // 删除选中商品
    async deleteAllGoods() {
      // 获取选中商品的id
      let checkedSkuId = this.cartInfoList.reduce((p, c) => {
        if (c.isChecked === 1) p.push(c.skuId);
        return p;
      }, []);
      try {
        await reqDeleteAllChecked(checkedSkuId);
        alert("批量删除成功");
      } catch (e) {
        alert(e.message);
      }
    },
    // 数量框输入 判断
    async everyGoodNum(e, cart) {
      const reg = /^[0-9]+$/g;
      if (reg.test(e.target.value) && e.target.value >= 1) {
        console.log(cart);
        this.oldNum = e.target.value;

        // 发送请求更新数量

        // 获取需要增减的数量
        let updataSkuNum = e.target.value - cart.skuNum;
        try {
          await reqAddShopCart(cart.skuId, updataSkuNum);
        } catch (e) {
          alert(e.message);
        }
      } else {
        e.target.value = this.oldNum;
      }
    },
    // 保存当前商品数量
    setOldNum(e) {
      this.oldNum = e.target.value;
    },
  },
  data() {
    return {
      cartInfoList: [],
      oldNum: 1,
    };
  },
  computed: {
    AllChecked: {
      get() {
        return this.cartInfoList.every((item) => item.isChecked === 1);
      },
      async set(e) {
        //  获取购物车页商品id列表
        let skuIdList = this.cartInfoList.map((item) => item.skuId);

        try {
          await reqChangeAllChecked(e ? 1 : 0, skuIdList);
          alert("全部状态修改成功");
          // 重新获取数据
          this.getShopCart();
        } catch (e) {
          alert(e.message);
        }
      },
    },
    checkedGoodsNum() {
      return this.cartInfoList.reduce((p, c) => {
        if (c.isChecked === 1) p += c.skuNum;
        return p;
      }, 0);
    },
    checkedGoodsPrice() {
      return this.cartInfoList.reduce((p, c) => {
        if (c.isChecked === 1) p += c.skuPrice * c.skuNum;
        return p;
      }, 0);
    },
  },
};
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 4.1667%;
        }

        .cart-list-con2 {
          width: 25%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con3 {
          width: 20.8333%;

          .item-txt {
            text-align: center;
          }
        }

        .cart-list-con4 {
          width: 12.5%;
        }

        .cart-list-con5 {
          width: 12.5%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 12.5%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 12.5%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>
